Schmertmann Oturma Analizi                                                                             

This application calculates settlement of a footing placed on a cohesionless material (sand) using the Schmertmann method (Schmertmann, 1970, Schmertmann et al, 1978).

Input

• Units:
  • kPa: This gives stress in kPa (kilopascals), length in m (meters) and settlement in cm (centimeters)
  • ksf: This gives stress in ksf (1000 pounds per square foot), length in feet and settlement in inches
  • tsf: This gives stress in tsf (tons per square foot), length in feet and settlement in inches
• Layers:
  • Thickness: This is the thickness of each layer starting from the surface, not from the bottom of the footing.
  • q_c: This is the cone tip bearing resistance from a Cone Penetration Test.
  • E_s: This is the one-dimensional modulus used in the settlement calculation. You may choose to enter this directly. Otherwise, it will be calculated from q_c (see below)
  • γ_moist: Unit weight of soil above the water table.
  • γ_sat: Unit weight of soil above below the water table (saturated).
• Options:
  • Use E_s: By default, you must enter q_c for each layer and the program converts to the one-dimensional modulus E_s (as shown here). By choosing this option, you may enter E_s directly.
  • Use modified Schmertmann (1978): In Schmertmann et al (1978), more accurate equations were derived for the strain profile and for converting q_c to E_s
  • Subdivide layers: The accuracy of results improves as more layers are entered. Select this option and the program will automatically divide up your soil layers to ensure a good discretization

Settlement Calculation

Details of the settlement calculation can be found here.